How well do you understand living things and their vital processes? Whether you are preparing for JAMB, WAEC, NECO and Post-UTME, these Biology past questions and answers cover such subjects as the chemistry of life, botany, evolution, genetics, ecology etc to help you know what to expect, improve your speed and confidence and be really prepared for the actual aptitude test.
Which of the following has the most primitive respiratory system?
snail
fish
insect
mouse
Correct answer is A
The evolutionary trend of respiratory systems from simple to complex
Diffusion through skin/cell → gills → tracheal tubes → book lungs → lungs
Some groups of snails that live in freshwater respire with gills, while other groups need to reach the surface to breathe air. In addition, some are amphibious and have both gills and a lung. Their lack of organ specificity accounts for their primitive status when it comes to respiration.
Which of the following uses diffusion as its principal method of gaseous exchange?
lizard
grasshopper
rat
earthworm
Correct answer is D
No explanation has been provided for this answer.
The plant waste product used to convert hide to leather is
gum
alkaloid
tannin
resin
Correct answer is C
No explanation has been provided for this answer.
The pineapple is an example of
a dehiscent fruit
an aggregate fruit
a composite fruit
a simple fruit
Correct answer is C
No explanation has been provided for this answer.
The pancreas secretes enzymes for the digestion of
fats, proteins, and carbohydrates
fats, vitamins, and cellulose
fats, carbohydrates, and vitamins
protein, cellulose, and minerals
Correct answer is A
No explanation has been provided for this answer.